90780732 has 108 divisors (see below), whose sum is σ = 272255256. Its totient is φ = 25421760.

The previous prime is 90780709. The next prime is 90780737. The reversal of 90780732 is 23708709.

It is a super-2 number, since 2×90780732² = 16482282604911648, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90780737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 93007 + ... + 93977.

It is an arithmetic number, because the mean of its divisors is an integer number (2520882).

Almost surely, 2^90780732 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90780732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136127628).

90780732 is an abundant number, since it is smaller than the sum of its proper divisors (181474524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90780732 is a wasteful number, since it uses less digits than its factorization.

90780732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048 (or 1036 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 90780732 is about 9527.8923167718. The cubic root of 90780732 is about 449.4325885472.

The spelling of 90780732 in words is "ninety million, seven hundred eighty thousand, seven hundred thirty-two".